Method of connecting alpha collapsible cellophane tube to alpha metallic dispensing terminal



Aug. 8, 1933. G. w. BUNGAY 1,921,021'

. METHOD OF CONNECTING A COLLAPSIBLE CELLOPHANE TUBE TO A METALLIC DISPENSING TERMINAL Filed June 3. l1931 atented ug. 8, l 933 399219021 METHOD OF ACONNECTING A COLLAPSIBLE CELLOPHANE TUBE TO A METALLIC DIS PENSING TERMINAL l George W. Bungay, Plainield,- N. J., assignor to Aluminum Company of America, Pittsburgh, Pa., a. Corporation of Pennsylvania Application June 3, 1931. Serial No. 541,934

1 Claim. (Cl. .Z9-148.2)

The invention relates to the manufacture The invention will be further explained with of collapsible tubes, such as those used for disreference to the accompanying drawing, of which pensing tooth paste, face and other creams, Fig. 1 is a central sectional vie'w of one form of and the like. metallic dispensing terminal; Fig. 2 a central 5 Several attempts have been ymade to form the sectional View through the terminal of Fig. 1 and 60 collapsible bodies of such tubes of cellophane a collapsible cellophane tube attached to it, the so that their contents may be observed, and to view-including, in diagrammatic form, apparatus form the dispensing terminals of metal so that elements for making the connection between the removable caps may be readily atttached to terminal and tube; Fig. 3 a central sectional them, but, as far as I am aware, all such atview of another form of metallic dispensing ter- 65 tempts have been unsuccessful because of failminal, combined with a side view of an end ures of the connections between the tubes and of a collapsible cellophane tube in position to the terminals. These connections have not been be applied to the terminal; and Fig. 4 a censufiiciently tight to prevent leakage of the contral sectional` View through the terminalI and tents of the tubes, or to prevent separation of tube of Fig. 3 attached to each other, the view 70 or relative movements between the two parts, including, in diagrammatic form, elements of as when the closure caps are tightened upon apparatus for making the connection between the terminals. the terminal and tube.

The object of this invention is to provide a Having reference first to Figs. 1 and 2, the 2O method of so connecting a collapsible cellophane metallic dispensing terminal 1 there shown com- 75 tube to a metal dispensing terminal that a seprises an exteriorly threaded neck 2 for the cure, durable and leak-tight joint may be easily reception of a closure cap, and, adjoining the and economically formed. neck, a groove 3 formed between walls 4 and 5,

In the practice of this invention, a collapsible the wall 4 being in effect a prolongation of cellophane tube is attached to a metallic disneck 2. The walls 4 and 5 being spaced from 80 Vpensing terminal by forming a groove at the each other, make it possible to readily roughen edge of the terminal, inserting the end of the one or the other thereof, the wall 5 being shown tube in the groove, and pressing the walls of at 6 aS being radially knurled or otherwise suitthe groove upon the tube. The dispensing terably roughened. As previously explained, a minal is preferably die cast from tin, lead, grOOVe-fOrming Wall of a terminal is Toughened 85 aluminum, or other suitable metal, and the celwhen the terminal is die-cast or otherwise lophane tube is molded or otherwise formed in formed from metal which'is harder than the any suitable or desired manner. To afford a cellophane tube. tight joint between the end of the tube'and In Fig- 2, a CellODhane tube 7 iS Shown with the terminal, one or the other of the interits upper end pressed between the Walls 4 and 90 engaged portions of these members is rough- 5 vof the terminal, the upper end of the tube ened, and the pressure applied to the walls of the being molded 0r Otherwise shaped in conical groove is not only such as to bring them into form the same, or substantially the same, as rm contact with the tube, but also to cause the that of the inner face of wall 5 of the terminal. roughened wall of one to deform the Wall of the For pressing the Walls of the terminal into firm 95 other member, thereby .effecting an interlocking engagement with the upper end of tube '7, and of the two members. In case the terminal memfor simultaneously causing the roughened face 6 ber is formed of tin or lead, either of which of wall 5 to deform the adjacent wall of the tube, is softer than the cellophane used to form cola mandrel 8, provided at its upper end with a lapsible tubes, a wall of the engaged end of conical face 9 and a centering projection 9a, may 100 the tube is roughened so that its projections be inserted int the tube to turn wall 4 of the are pressed into the relatively soft metal of a terminal outwardly and press it against the tube wall of the terminal groove. In case the terand against outerterminal wall 5, which wall minal member is formed of aluminum, which may be held by the lower end of a sleeve-like is harder than the cellophane used for the tubes, die 10 having a conical face. 105

the roughening is applied to a wall of the groove In Fig. 3 there is shown another form of disformed in the dispensing terminal. It will be pensing terminal 11, comprising a threaded neck understood that both the inner and outer walls 1.2, a conical top 13 and a pair of walls 14 and of the tube, or both walls of the groove, may 15 depending from the edge of top 13 and formbe roughened for the purpose explained. ing between them a groove 16 for the reception 110 of the' upper end of a collapsible cellophane tube 17. In this case the upper end of tube 17 has its outer wall knurled or otherwise roughened, as shown at 18, the wall o! the tube being roughened when the terminal is formed of a metal softer than the cellophane.

Afterthe upper end of tube 17 has-been iri-` serted in groove 16 of terminal ,11, the grooverormin'g walls 14 and 15 are pressed into iirm engagement with the end of the tube, and the roughened surface 18 of the tube is simultaneously caused to deform the adjacent face of the wall 14 of' the terminal. This may be done in a manner indicated by Fig. 4, which shows a mandrel or swedging punch 20 inserted through tube 17. With mandrel 20 in this po the softer'members, prevent relative movements between the tubes and terminals. The simplicity of the connections, and the economical way in which they may be made, are obvious' from the foregoing explanation of the invention.

According to the provisions of the patent statutes, I have explained the principle and mode of operation of my invention, and have illustrated and described the specific ways in which it may be practiced. However, I desire to have it understood that, within the scope of the appendedclaim, the invention `may be practiced otherwise than as specifically illustrated and described.

I claim as my invention:

The method of connecting a' collapsible cellophane tube member to a metallic dispensing terminal member having vertical depending side walls and being of different hardness than the tube member, comprising forming a groove at the edge of the terminal member extending upwardly into said vertical side walls of the terminal member, a wall oi which is a substantially cylindrical surface, roughening a wall of the harder member for contact with the wall of the softer member, inserting' an end `of the tube in said groove, and pressing the walls of said groove upon the Vtube and into such rm contact therewith that the roughened wall of the harder deforms the wall of the softer member, thereby forming an interlocking connection without deforming the upper end of the cellophane tube member.

GEORGE W. BUNGAY. 

